Green Nanocomposites from Rosin-Limonene Copolymer and Algerian Clay.

Hodhaifa Derdar,Amine Harrane,Sara Haoue,Khaldoun Bachari,Geoffrey Robert Mitchell,Vidhura Subash Mahendra,Mohamed Benachour,Zakaria Cherifi,Rachid Meghabar

doi:10.3390/polym12091971

Abstract

Green nanocomposites from rosin-limonene (Ros-Lim) copolymers based on Algerian organophilic-clay named Maghnite-CTA+ (Mag-CTA+) were prepared by in-situ polymerization using different amounts (1, 5 and 10% by weight) of Mag-CTA+ and azobisisobutyronitrile as a catalyst. The Mag-CTA+ is an organophilic montmorillonite silicate clay prepared through a direct exchange process; the clay was modified by ultrasonic-assisted method using cetyltrimethylammonuim bromide in which it used as green nano-filler.The preparation method of nanocomposites was studied in order to determine and improve structural, morphological, mechanical and thermal properties ofsin.The structure and morphology of the obtained nanocomposites(Ros-Lim/Mag-CTA+) were determined using Fourier transform infrared spectroscopy, X-ray diffraction, scanning electronic microscopy and transmission electronic microscopy. The analyses confirmed the chemical modification of clay layers and the intercalation of rosin-limonene copolymer within the organophilic-clay sheets. An exfoliated structure was obtained for the lower amount of clay (1% wt of Mag-CTA+), while intercalated structures were detected for high amounts of clay (5 and 10% wt of Mag-CTA+). The thermal properties of the nanocomposites were studied by thermogravimetric analysis (TGA) and show a significant improvement inthe thermal stability of the obtained nanocomposites compared to the purerosin-limonene copolymer (a degradation temperature up to 280 °C).

Highlights

In the most recent decades, interest has increased in a new class of materials, which consist of one or more distinct components that together produce nanomaterials called nanocomposites.The use of these new materials was initiated by Toyota researchers in the early 1990s
Some nanocomposites based on resistance, high mechanical resistance, high degradation temperature and increased biodegradability toxic polymers have been replaced by others based green materials
We found that no previously published work has described the use of natural clay as a nano-reinforcing filler in the preparation of green-nanocomposites based on rosin-limonene copolymer

Summary

Introduction

In the most recent decades, interest has increased in a new class of materials, which consist of one or more distinct components that together produce nanomaterials called nanocomposites. The use of these new materials was initiated by Toyota researchers in the early 1990s. By dispersing clays in polyamide-6 by in-situ polymerization, they showed a significant improvement in the dimensional stability of the polymer matrix [1]. These results have been perspectives for polymer matrix nanocomposites in many scientific areas [2]. Some nanocomposites based on resistance, high mechanical resistance, high degradation temperature and increased biodegradability toxic polymers have been replaced by others based green materials

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Conclusion